The truck was hauling an excavator, and did not require a pilot vehicle. “The problem is, the boom on the excavator was raised,” Gill said.

The truck was headed south and hit overpasses on U.S. Highway 101 and Crosby Boulevard, Trosper Road and I-5, a pedestrian overpass in the Tumwater area, 93rd Avenue, and 113th Avenue Southeast off I-5, Gill said.

“The driver did tell us that he did feel some surges while he was driving, but he didn’t know what that could be,” Gill said. Several motorists witnessed the collisions, Gill said.

Two vehicles sustained damage from debris related to the collisions, he said. Both vehicles had flat tires from hitting concrete that fell from the overpasses, he said.

Crews were able to verify damage to the overpasses at Crosby, 93rd and 113th, according to Doug Adamson, a spokesman for the Washington State Department of Transportation. As of Friday afternoon, there were no lane restrictions underway due to the damage, he said.

“We will inspect each bridge more thoroughly on Monday to estimate what repairs will need to be done,” he added.